package com.kk.strategy.traditional;

/**
 * @author MH
 */
abstract class Duck {

    public Duck(){}

    public void quack(){
        System.out.println("鸭子叫");
    }
    public void swim(){
        System.out.println("鸭子游泳");
    }
    public void fly(){
        System.out.println("鸭子飞");
    }
}
